2 * arch/v850/kernel/rte_nb85e_cb.c -- Midas labs RTE-V850E/NB85E-CB board
4 * Copyright (C) 2001,02,03 NEC Electronics Corporation
5 * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License. See the file COPYING in the main directory of this
9 * archive for more details.
11 * Written by Miles Bader <miles@gnu.org>
14 #include <linux/config.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
18 #include <linux/swap.h>
19 #include <linux/bootmem.h>
20 #include <linux/irq.h>
22 #include <asm/atomic.h>
24 #include <asm/v850e.h>
25 #include <asm/rte_nb85e_cb.h>
29 void __init mach_early_init (void)
31 /* Configure caching; some possible settings:
33 BHC = 0x0000, DCC = 0x0000 -- all caching disabled
34 BHC = 0x0040, DCC = 0x0000 -- SDRAM: icache only
35 BHC = 0x0080, DCC = 0x0C00 -- SDRAM: write-back dcache only
36 BHC = 0x00C0, DCC = 0x0C00 -- SDRAM: icache + write-back dcache
37 BHC = 0x00C0, DCC = 0x0800 -- SDRAM: icache + write-thru dcache
39 We can only cache SDRAM (we can't use cache SRAM because it's in
40 the same memory region as the on-chip RAM and I/O space).
42 Unfortunately, the dcache seems to be buggy, so we only use the
44 v850e_cache_enable (0x0040 /*BHC*/, 0x0003 /*ICC*/, 0x0000 /*DCC*/);
49 void __init mach_get_physical_ram (unsigned long *ram_start,
50 unsigned long *ram_len)
52 /* We just use SDRAM here. */
53 *ram_start = SDRAM_ADDR;
54 *ram_len = SDRAM_SIZE;
57 void mach_gettimeofday (struct timespec *tv)
63 /* Called before configuring an on-chip UART. */
64 void rte_nb85e_cb_uart_pre_configure (unsigned chan,
65 unsigned cflags, unsigned baud)
67 /* The RTE-NB85E-CB connects some general-purpose I/O pins on the
68 CPU to the RTS/CTS lines the UART's serial connection, as follows:
69 P00 = CTS (in), P01 = DSR (in), P02 = RTS (out), P03 = DTR (out). */
71 TEG_PORT0_PM = 0x03; /* P00 and P01 inputs, P02 and P03 outputs */
72 TEG_PORT0_IO = 0x03; /* Accept input */
74 /* Do pre-configuration for the actual UART. */
75 teg_uart_pre_configure (chan, cflags, baud);
78 void __init mach_init_irqs (void)